US9612319B2 - Laser surveying device - Google Patents

Laser surveying device Download PDF

Info

Publication number
US9612319B2
US9612319B2 US14/810,859 US201514810859A US9612319B2 US 9612319 B2 US9612319 B2 US 9612319B2 US 201514810859 A US201514810859 A US 201514810859A US 9612319 B2 US9612319 B2 US 9612319B2
Authority
US
United States
Prior art keywords
spot diameter
laser beam
pump laser
light
distance measuring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
US14/810,859
Other languages
English (en)
Other versions
US20160061939A1 (en
Inventor
Taizo Eno
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Topcon Corp
Original Assignee
Topcon Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Topcon Corp filed Critical Topcon Corp
Assigned to KABUSHIKI KAISHA TOPCON reassignment KABUSHIKI KAISHA TOPCON ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ENO, TAIZO
Publication of US20160061939A1 publication Critical patent/US20160061939A1/en
Application granted granted Critical
Publication of US9612319B2 publication Critical patent/US9612319B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/10—Systems determining position data of a target for measuring distance only using transmission of interrupted, pulse-modulated waves
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/4808—Evaluating distance, position or velocity data
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/483—Details of pulse systems
    • G01S7/484—Transmitters
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
    • G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
    • G02B26/10—Scanning systems
    • G02B26/12—Scanning systems using multifaceted mirrors
    • G02B26/127—Adaptive control of the scanning light beam, e.g. using the feedback from one or more detectors
    • G02B26/128—Focus control
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • the present invention relates to a laser surveying device which carry out distance measurement by projecting a laser beam to an object to be measured and receiving a reflected light from the object to be measured.
  • a laser surveying device which projects a laser beam in pulses to an object to be measured, receives a reflection light, from the object to be measured by a photodetection element and carries out distance measurement per each pulse.
  • the distance measurement is carried out by a TOF (Time of Flight) method which carry out distance measurement by emitting the next pulsed distance measuring light after receiving a pulsed distance measuring light reflected from the object to be measured.
  • TOF Time of Flight
  • the peak power of the pulsed distance measuring light differs according to the distance to the object to be measured.
  • the peak power and the repetition frequency of the pulsed distance measuring light as projected to the object to be measured are fixed.
  • a laser surveying device comprises a light emitting unit for emitting a pulsed distance measuring light, a photodetection unit for receiving a reflected pulsed distance measuring light and a control, arithmetic unit for controlling the light emitting unit and for calculating a distance to an object to be measured based on a photodetection signal from the photodetection unit, wherein the light emitting unit has a pump laser source for emitting a pump laser beam, a spot diameter changing means for changing a spot diameter of the pump laser beam, and an optical cavity for emitting the pump laser beam entering via the spot diameter changing means as the pulsed distance measuring light.
  • the spot diameter changing means has a liquid lens, wherein the spot diameter changing means changes a focal length of the liquid lens by changing a voltage to be applied on the liquid lens and changes a pump spot diameter of the pump laser beam entering the optical cavity.
  • the liquid lens has two or more electrodes divided in a circumferential direction
  • the spot diameter changing means applies voltage on each of the electrodes, and changes a focusing direction of the pump laser beam.
  • control arithmetic unit increases a light emission frequency when a spot diameter of the pump laser beam is small, and decreases the light emission frequency when the spot diameter of the pump laser beam is large.
  • the laser surveying device comprises a light emitting unit for emitting a pulsed distance measuring light, a photodetection unit for receiving a reflected pulsed distance measuring light and a control arithmetic unit for controlling the light, emitting unit and for calculating a distance to an object to be measured based on a photodetection signal from the photodetection unit, wherein the light emitting unit has a pump laser source for emitting a pump laser beam, a spot diameter changing means for changing a spot diameter of the pump laser beam, and an optical cavity for emitting the pump laser beam entering via the spot diameter changing means as the pulsed distance measuring light.
  • the peak power of the pulsed distance measuring light as emitted from the light emitting unit is capable of being changed, and it is possible to perform distance measurement at a near distance where the pulsed distance measuring light with low peak power and high repetition frequency is demanded and to carry out distance measurement at a long distance where the pulsed distance measuring light with high peak power and low repetition frequency is demanded.
  • the spot diameter changing means has a liquid lens, wherein the spot diameter changing means changes a focal length of the liquid lens by changing a voltage to be applied on the liquid lens and changes a pump spot diameter of the pump laser beam entering the optical cavity.
  • the liquid lens has two or more electrodes divided in a circumferential direction
  • the spot diameter changing means applies voltage on each of the electrodes, and changes a focusing direction of the pump laser beam.
  • the control arithmetic unit increases a light emission frequency when a spot diameter of the pump laser beam is small, and decreases the light emission frequency when the spot diameter of the pump laser beam is large. As a result, optimum distance measurement can be accomplished depending on the distance to the object to be measured.
  • FIG. 1 is a schematical block diagram to show a laser surveying device according to an embodiment of the present invention.
  • FIG. 2 is a schematical side view to show a light emitting unit of the laser surveying device.
  • FIG. 3A is a schematical side view to show a case where voltage to be applied to a liquid lens used at a light emitting unit is low
  • FIG. 3B is a schematical side view to show a case where voltage to be applied to the liquid lens is high.
  • FIG. 4A is a drawing to explain a case where distance is measured to an object to be measured, which is located at a near distance by the laser surveying device according to an embodiment of the present invention
  • FIG. 4B is a drawing to explain a case where distance is measured to an object to be measured, which is located at a long distance, by she laser surveying device.
  • a laser surveying device is a laser surveying device, by which light pulses of laser beam are projected and a distance measurement is carried out per each light pulse.
  • reference numeral 1 denotes a laser surveying device and reference numeral 2 denotes an object to be measured (a target), e.g. a prism.
  • the laser surveying device 1 comprises a control arithmetic unit 3 , a storage unit 4 , a light emitting circuit 5 , a light emitting unit 6 which is a light source, a photodetection circuit 7 , a photodetection element 8 which is a photodetector, and a display unit 9 .
  • the storage unit 4 has a data storage region and a program storage region.
  • Data such as a distance measurement data, data for associating a voltage of a liquid lens (to be described later) with a curvature of de liquid lens, and other data are stored in the data storage region.
  • Various types of programs are stored in the program storage region. These programs include: a sequence program for executing distance measurement by the laser surveying device 1 , a distance calculating program for calculating a distance based on a photodetection result from the photodetection circuit 7 , a peak power change program for changing a peak power of a light, pulse to be projected, and other programs.
  • the light emitting unit 6 is a light source which emits a laser beam by pulse emission and is driven by the light, emitting circuit 5 .
  • the light pulse as emitted is projected to the object to be measured 2 via a distance measuring optical path (hereinafter, referred as “external optical path”) 10 as a pulsed distance measuring light, and a reflection light reflected by the object to be measured 2 is received by the photodetection element 8 via the external optical path 10 .
  • the laser surveying device 1 has an internal reference optical path (hereinafter, referred as “internal optical path”) 11 , and the internal optical path 11 is configured to guide one part of the pulsed distance measuring light emitted by the light emitting unit 6 to the photodetection element 8 as an internal reference light.
  • the external optical path 10 is divided, by a half mirror 12 , one part of the pulsed distance measuring light is divided by the half mirror 12 as an internal reference light and the one part of the pulsed distance measuring light is guided to the internal optical path 11 .
  • An external light amount adjusting means 13 and an internal light amount adjusting means 14 are provided on a return path of the external optical path 10 and on the internal optical path 11 respectively, and the external light amount adjusting means 13 and the internal light amount adjusting means 14 are capable of operating independently.
  • the light amount is adjusted in such a manner that the light amount of the reflected pulsed distance measuring light entering via the external optical path 10 and the light amount of the internal reference light entering via the internal optical path. 11 are approximately equal to each other.
  • Each of the external light amount adjusting means 13 and the internal light amount adjusting means 14 is an aperture, for instance, and is a disk, having aperture orifices where opening diameters gradually decrease or opening diameters gradually increase and the aperture orifices are provided on the same circumference.
  • an actuator such as a motor and the like, it becomes possible to gradually increase or gradually decrease the light mount entering the photodetection element 8 .
  • the external light amount adjusting means 13 and the internal light amount adjusting means 14 are density filters and may be designed so that an optical transmissivity is gradually decreased or gradually increased on the same circumference and along a circumferential direction.
  • the control arithmetic unit 3 controls a light emitting condition, e.g. a light emission intensity and a light emission frequency, of the light emitting unit. 6 via the light emitting circuit 5 and controls the adjustment of light amount by the external light amount adjusting means 13 and the adjustment of light amount by the internal light amount adjusting means 14 . Further, the control arithmetic unit 3 controls a spot diameter changing means (to be described, later) and controls a size of a spot diameter of a pump laser beam.
  • a light emitting condition e.g. a light emission intensity and a light emission frequency
  • the pulsed distance measuring light is emitted by driving the light emitting circuit 5 , projected to the object to be measured 2 via the external optical path 10 and receives the reflected light from the object to be measured 2 by the photodetection element 8 .
  • a photodetection signal from the photodetection element 8 is signal processed and the like by the photodetection circuit 7 and is stored in the storage unit 4 .
  • an internal, reference light is received by the photodetection element 8 for a predetermined time period via the internal optical path 11 and a photodetection signal is stored in the storage unit 4 after being signal processed as required by the photodetection circuit 7 .
  • the control arithmetic unit 3 calculates a time difference between the moment when a reflected pulsed distance measuring light is received by the photodetection element 8 and the moment when the internal reference light is received by the photodetection element 8 , and the control arithmetic unit 3 calculates a distance to the object to be measured 2 based on the time difference and the light velocity.
  • distance measurement may be carried out by only the reflected distance measuring light, by intercepting the internal optical path 11 or by omitting the internal reference light.
  • an accurate distance measurement can be accomplished by subtracting the internal optical path length during the calculation process, and an error on the circuit of the light emitting circuit 5 and the photodetection circuit 7 can be offset.
  • the light emitting unit 6 has a housing 15 , and a pump laser source 17 , a liquid lens 19 which contains a first focus lens 18 and a second focus lens and an optical cavity 21 are provided in the housing 15 .
  • reference numeral 16 denotes a laser output coupler mirror, which is one part of the housing 15 . Further, the first focus lens 18 and the liquid lens 19 make up together the spot diameter changing means 20 .
  • the pump laser source 17 is a laser diode, for instance, and is configured so as to emit a pump laser beam 22 with a wavelength of 808 nm.
  • the first focus lens 18 and the liquid lens 19 focuses the pump laser beam 22 and enters the pump laser beam 22 with the predetermined pump spot diameter into the optical cavity 21 .
  • the optical cavity 21 comprises a laser crystal 23 such as an Nd:YAG crystal and the like, a saturable absorber 24 such as a Cr:YAG crystal and the like, a first cavity mirror 25 provided on an incident surface and a second cavity mirror 26 provided on an output coupler surface.
  • the pump laser beam 22 entered through the liquid lens 19 to the optical cavity 21 is absorbed by the laser crystal 23 and emits a near-infrared light with a wavelength of 1064 nm.
  • the near-infrared light oscillates in a Q switch pulse operation by the saturable absorber 24 and the optical cavity 21 , and is so arranged that a pulsed distance measuring light 28 with a wavelength of 1064 nm having a predetermined peak power is emitted through the laser output coupler mirror 16 .
  • reference letter h denotes a Planck's constant
  • reference letter ⁇ denotes a number of vibration
  • reference letter A denotes a pump spot diameter of the pump laser beam. 22 entering the optical cavity 21
  • reference letter l′ denotes a length of the optical cavity 21
  • reference letters tr denote a cavity round-trip time
  • reference letter R denotes a multiplication value of reflectivity of the first cavity mirror 25 and the second cavity mirror 26
  • reference symbol “ ⁇ max′” denotes a number of photons accumulated at the optical cavity 21 . Therefore, the peak power of the pulsed distance measuring light 28 is proportional to the pump spot diameter of the entering pump laser beam 22 .
  • the liquid lens 19 has such structure where a liquid lens element is sealed inside and in a central portion, a window unit. 29 is formed where the pump laser beam 22 passes through. Both the front-and-rear surfaces of the window unit 29 are sealed by sealing plates 31 and 31 , which are made of transparent resin and the like, in such a manner that an inside portion is liquid-tight.
  • sealing plates 31 and 31 which are made of transparent resin and the like, in such a manner that an inside portion is liquid-tight.
  • a conductive aqueous solution. 32 and a non-conductive oil 33 are sealed in as liquid lens elements, and a lens unit. 34 is formed by a boundary surface of the aqueous solution 32 and the oil 33 .
  • the liquid lens 19 has a ring-shaped lens frame 35 to form the window unit 29 .
  • a slope 36 with its diameter gradually increasing is formed on a side of the lens frame 35 where the pump laser beam 22 enters.
  • the lens frame 35 is a first electrode.
  • a ring-like insulator 37 and a second electrode 38 are provided along an outer edge, and the lens frame 35 and the second electrode 38 are electrically insulated from each other.
  • the second electrode 38 is connected with a negative electrode of a power source 41 for focus adjustment via a voltage regulator 39 , and the lens frame 35 is connected with a positive electrode of the power source 41 for focus adjustment.
  • a voltage is applied on the lens frame 35 , a force trying to come in contact with the slope 36 acts on the aqueous solution 32 .
  • the voltage regulator 39 adjusts the voltage applied according to a control signal from the control arithmetic unit 3 , and the curvature of the lens unit 34 can be changed by adjusting the voltage.
  • FIG. 3A shows a condition where voltage of 45V is applied on the lens frame 35 and FIG. 3B shows a condition where voltage of 60V is applied on the lens frame 35 .
  • FIG. 3A and FIG. 3B by changing the voltage to be applied on the lens frame 35 , it becomes possible to change the curvature of the lens unit 34 and to change a focal length of the liquid lens 19 .
  • Data which associate the curvature of the lens unit 34 with the voltage to be applied on the lens frame 35 is stored in the storage unit. 4 (see FIG. 1 ) in advance.
  • the applied voltage By adjusting the applied voltage by means of the voltage regulator 39 , it is possible to control the lens unit 34 to the curvature as desired and to control the liquid lens 19 so as to have the focal length as desired.
  • the focal length of the liquid lens 19 it is possible to change the soot diameter of the pump laser beam 22 entering the optical cavity 21 , and to control in such a manner that the pulsed distance measuring light 28 as emitted from the light emitting unit 6 has the peak power as desired.
  • FIG. 4A shows a case where the object to be measured 2 is at a near distance
  • FIG. 4B shows a case where the distance to the object to be measured 2 is at a long distance.
  • reference letter P denotes a peak power of the pulsed distance measuring light 28 and reference letter L denotes a distance to the object to be measured 2 .
  • the peak power of a reflected pulsed distance measuring light 42 as reflected by the object to be measured 2 is proportional to 1/L 2 .
  • shuttle time t becomes shorter and pulse frequency f becomes longer. That is, it is possible to increase the repetition frequency (pulse frequency). Further, in a case where the value of the distance L 1 is small, since an attenuation of the reflected pulsed distance measuring light 42 will be decreased, a peak power P 1 of the pulsed distance measuring light 28 projected from the laser surveying device 1 may be smaller.
  • shuttle time t becomes longer and pulse frequency f becomes smaller.
  • pulse frequency f becomes smaller.
  • the spot diameter changing means 20 increases the voltage to be applied on the lens frame 35 and decreases the focal length of the liquid lens 19 (the focal position is coincided with the optical cavity 21 ), the pump spot diameter of the pump laser beam 22 entering the optical cavity 21 will be smaller, and the pulsed distance measuring light 23 with low peak power and high repetition frequency can be projected.
  • the pulsed distance measuring light 28 With low peak power and high repetition frequency, it is possible to carry out distance measurement with respect to the object cc be measured 2 in a short time and with higher density.
  • the spot diameter changing means 20 decreases the voltage to be applied on the lens frame 35 and makes the focal length of the liquid lens 19 longer, the pump laser beam 22 entering the optical cavity 21 become an unfocused condition, the spot diameter is increased, and it is possible to project the pulsed distance measuring light 28 with high peak power and low repetition frequency.
  • the reflected pulsed distance measuring light 42 as reflected by the object to be measured 2 is capable of having a sufficient peak power. As a result, a distance measurement with respect to the object to be measured 2 can be performed in a reliable manner.
  • the spot diameter changing means 20 is provided inside the Light emitting unit 6 and since the pump spot diameter can be changed by the pump laser beam 22 entering the optical cavity 21 by the spot diameter changing means 20 , it is possible to change the peak power of the pulsed distance measuring light 28 projected by the light emitting unit 6 .
  • the single laser surveying device 1 enables to perform a distance measurement at near distance where the pulsed distance measuring light 28 with low peak power and high repetition frequency is required and a distance measurement at long distance where the pulsed distance measuring light 28 with high peak power and low repetition frequency is required.
  • the first focus lens 18 and the liquid lens 19 are used as the spot diameter changing means 20 , the focal length is changed by the amount of voltage so be applied on the liquid lens 19 and that the pump spot diameter can be changed.
  • a motor or the like for changing the position of the lens is not necessary, the miniaturization and simplification of a device are performed and this contributes to the decrease of power consumption.
  • the first focus lens 18 and the liquid lens 19 are used as the spot diameter changing means 20 in the present embodiment, if the focal length of the pump laser beam 22 is changed and if the pump spot diameter can be changed, other arrangements may be adopted.
  • a lens holder having a plurality of lenses with different focal lengths may be provided and by changing over the lens positioned on the optical axis of the pump laser beam 22 and by rotating the lens holder, it may be arranged so that she focal length of the pump laser beam 22 is changed and the pump spot diameter is changed.
  • the lens frame 35 of the liquid lens 19 and the second electrode 38 are designed in ring shape, it may be arranged in such a manner that the lens frame. 35 and the second electrode 38 are divided to 8 parts in a circumferential direction, for instance, and voltage can be applied by the spot diameter changing means 20 for each of the electrodes thus divided.
  • the shape of the lens unit 34 changes. Since the projecting direction of the pump laser beam 22 which passes through the liquid lens 19 can be changed, the entering position of the pump laser beam 22 , which enters the optical cavity 21 , can be adjusted, and thereby the optimal pumping condition is realized.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Measurement Of Optical Distance (AREA)
  • Plasma & Fusion (AREA)
US14/810,859 2014-08-26 2015-07-28 Laser surveying device Active US9612319B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2014-171374 2014-08-26
JP2014171374 2014-08-26

Publications (2)

Publication Number Publication Date
US20160061939A1 US20160061939A1 (en) 2016-03-03
US9612319B2 true US9612319B2 (en) 2017-04-04

Family

ID=53724040

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/810,859 Active US9612319B2 (en) 2014-08-26 2015-07-28 Laser surveying device

Country Status (6)

Country Link
US (1) US9612319B2 (fr)
EP (1) EP2990821A1 (fr)
JP (1) JP6654009B2 (fr)
KR (1) KR20160024787A (fr)
CN (1) CN105388483B (fr)
RU (1) RU2015135177A (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6906919B2 (ja) * 2016-09-30 2021-07-21 パイオニア株式会社 検出装置、制御方法及びプログラム
CN106646500B (zh) * 2016-12-29 2019-04-05 北京理工大学 一种自适应闭环调整激光测距方法及装置
JP2019078631A (ja) * 2017-10-24 2019-05-23 シャープ株式会社 パルス光照射受光装置、および光レーダー装置
CN109917194A (zh) * 2017-12-13 2019-06-21 清华四川能源互联网研究院 一种用于无线充电测试系统的自动激光距离校准套件
CN108594253B (zh) * 2018-04-11 2024-01-05 深圳市镭神智能系统有限公司 光脉冲测距方法、装置、激光雷达和存储介质
US11029408B2 (en) * 2019-04-03 2021-06-08 Varjo Technologies Oy Distance-imaging system and method of distance imaging
JP7416647B2 (ja) * 2020-03-12 2024-01-17 株式会社トプコン 測量装置
WO2022198376A1 (fr) * 2021-03-22 2022-09-29 深圳市大疆创新科技有限公司 Appareil de mesure de distance, appareil d'imagerie et cardan
US20240103141A1 (en) * 2021-03-30 2024-03-28 Nec Corporation Ranging device, ranging device control method, and ranging system
JP7413426B2 (ja) * 2022-03-18 2024-01-15 維沃移動通信有限公司 投光装置、測距装置及び電子機器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091263A1 (en) 2008-10-09 2010-04-15 Kabushiki Kaisha Topcon Laser surveying system and distance measuring method
US20100128109A1 (en) * 2008-11-25 2010-05-27 Banks Paul S Systems And Methods Of High Resolution Three-Dimensional Imaging
JP2010169525A (ja) 2009-01-22 2010-08-05 Topcon Corp 光波距離測定方法及び光波距離測定装置
US20110013172A1 (en) * 2008-12-15 2011-01-20 Toyota Jidosha Kabushiki Kaisha Object measuring device and method for use in the device
DE202012105023U1 (de) 2012-12-21 2013-01-30 Robert Bosch Gmbh Laserentfernungsmessgerät

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5394233A (en) * 1993-04-06 1995-02-28 Wang; Charles P. Apparatus for measuring high frequency vibration, motion, or displacement
JP2009037711A (ja) * 2007-08-03 2009-02-19 Pioneer Electronic Corp 液体レンズ、ピックアップ装置、及び収差補正方法等
CN101783060B (zh) * 2010-02-08 2012-02-01 河南鑫天通信信息网络有限公司 一种视力保护仪及其视力保护控制方法
CN102906623A (zh) * 2010-02-28 2013-01-30 奥斯特豪特集团有限公司 交互式头戴目镜上的本地广告内容
CN102414943B (zh) * 2010-03-02 2014-05-07 松下电器产业株式会社 波长转换装置及利用该波长转换装置的图像显示装置
JP2012084729A (ja) * 2010-10-13 2012-04-26 Hamamatsu Photonics Kk レーザ装置
JP6103179B2 (ja) * 2012-09-13 2017-03-29 株式会社リコー 距離測定装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100091263A1 (en) 2008-10-09 2010-04-15 Kabushiki Kaisha Topcon Laser surveying system and distance measuring method
JP2010091445A (ja) 2008-10-09 2010-04-22 Topcon Corp レーザ測量装置及び距離測定方法
US20100128109A1 (en) * 2008-11-25 2010-05-27 Banks Paul S Systems And Methods Of High Resolution Three-Dimensional Imaging
US20110013172A1 (en) * 2008-12-15 2011-01-20 Toyota Jidosha Kabushiki Kaisha Object measuring device and method for use in the device
JP2010169525A (ja) 2009-01-22 2010-08-05 Topcon Corp 光波距離測定方法及び光波距離測定装置
US20110270563A1 (en) 2009-01-22 2011-11-03 Kabushiki Kaisha Topcon Electro-Optical Distance Measuring Method And Electro-Optical Distance Measuring Device
DE202012105023U1 (de) 2012-12-21 2013-01-30 Robert Bosch Gmbh Laserentfernungsmessgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
European communication dated Jan. 15, 2016 in corresponding European patent application No. 15178039.2

Also Published As

Publication number Publication date
CN105388483A (zh) 2016-03-09
RU2015135177A (ru) 2017-02-27
JP6654009B2 (ja) 2020-02-26
JP2016048237A (ja) 2016-04-07
KR20160024787A (ko) 2016-03-07
CN105388483B (zh) 2020-07-31
US20160061939A1 (en) 2016-03-03
EP2990821A1 (fr) 2016-03-02

Similar Documents

Publication Publication Date Title
US9612319B2 (en) Laser surveying device
WO2017209206A1 (fr) Dispositif de détection de lumière et appareil électronique
CN108107419B (zh) 用于获取对象信息的光电传感器和方法
US8711368B2 (en) Prompt gap varying optical filter, analytical instrument, optical device, and characteristic measurement method
EP3301473B1 (fr) Dispositif de mesure de distance
US20190313007A1 (en) Infrared camera module, image sensor thereof, and electronic device
EP3248025B1 (fr) Commande de mise au point pour réseau à commande de phase optique permettant une sélection de portée d'infrarouge à courte longueur d'onde (swir) d'éclairage actif
US10555387B2 (en) Light-emitting element drive circuit and portable electronic instrument
CN102636151A (zh) 激光测距仪及其测距方法
US10557708B2 (en) Range finder
CN116710801A (zh) 具有发射光功率监视器的LiDAR系统
KR102184042B1 (ko) 카메라 장치
JP4761751B2 (ja) 距離測定装置
CN110850434A (zh) 可变焦距透镜装置
EP3588138A1 (fr) Appareil et procédé de positionnement par laser
RU2526230C1 (ru) Прибор наблюдения-прицел со встроенным импульсным лазерным дальномером
CN110806569A (zh) 一种激光雷达
US20180188370A1 (en) Compact distance measuring device using laser
JP2018040656A (ja) 距離測定装置
US11604275B2 (en) Laser positioning apparatus and laser positioning method
CN202649466U (zh) 激光测距仪
KR102087519B1 (ko) 눈보호기능의 오동작을 방지하는 빔프로젝터모듈 및 그 제어방법
US11801570B2 (en) Laser processing machine
KR20200086815A (ko) 카메라 모듈
EP3957951A1 (fr) Instrument d'arpentage

Legal Events

Date Code Title Description
AS Assignment

Owner name: KABUSHIKI KAISHA TOPCON, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ENO, TAIZO;REEL/FRAME:036196/0486

Effective date: 20150525

STCF Information on status: patent grant

Free format text: PATENTED CASE

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY

Year of fee payment: 4